This updates the List widget with the following capabilities:

Support for WIA-ARIA role listbox (fix #56 and #73)
Support for new selectionMode "radio"
No more default checkmarks on selected items (accessibility issues with
VoiceOver when using checkmarks), addition of samples that demonstrates
how to use your own (#49 can be closed)
remove deliver calls that are now useless.
update delite/decor deps
Update StarRating and list tests to uses assert.strictEqual instead of
assert.equal.
remove test on inexisting aria-selectable attribute.
excludeInstrumentation: avoid too long line (jshint error)
Fix errors reported by jshint.